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69 lines
1.4 KiB
69 lines
1.4 KiB
4 months ago
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/* which.c - Find executable files in $PATH.
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*
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* Copyright 2006 Rob landley <rob@landley.net>
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USE_WHICH(NEWTOY(which, "<1a", TOYFLAG_USR|TOYFLAG_BIN))
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config WHICH
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bool "which"
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default y
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help
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usage: which [-a] filename ...
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Search $PATH for executable files matching filename(s).
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-a Show all matches
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*/
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#include "toys.h"
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// Find an exectuable file either at a path with a slash in it (absolute or
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// relative to current directory), or in $PATH. Returns absolute path to file,
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// or NULL if not found.
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static int which_in_path(char *filename)
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{
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struct string_list *list;
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// If they gave us a path, don't worry about $PATH or -a
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if (strchr(filename, '/')) {
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// Confirm it has the executable bit set, and it's not a directory.
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if (!access(filename, X_OK)) {
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struct stat st;
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if (!stat(filename, &st) && S_ISREG(st.st_mode)) {
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puts(filename);
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return 0;
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}
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return 1;
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}
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}
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// Search $PATH for matches.
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list = find_in_path(getenv("PATH"), filename);
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if (!list) return 1;
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// Print out matches
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while (list) {
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if (!access(list->str, X_OK)) {
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puts(list->str);
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// If we should stop at one match, do so
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if (!toys.optflags) {
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llist_traverse(list, free);
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break;
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}
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}
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free(llist_pop(&list));
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}
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return 0;
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}
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void which_main(void)
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{
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int i;
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for (i=0; toys.optargs[i]; i++)
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toys.exitval |= which_in_path(toys.optargs[i]);
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}
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